Chowdhury, Indira
Oxford University Press, 2016
eBooks
Misumi, Jyuji
University of Michigan Press, 1985.
Buku Teks
Wilson, E. Bright
McGraw-Hill, 1952
Buku Teks
Freedman, Paul
Public Affairs Press, 1950
Buku Teks
Russell, Richard Joel
May, 1960
Buku Teks